mg Powder + Diluent → mg/mL Calculator
Calculate concentration (mg/mL) after reconstituting a powder vial to a final volume (mL). Use the final volume stated on the label/monograph.
Tip: commas are allowed (e.g. 1,000).
After reconstitution — use the final volume stated on the label/monograph.
Educational use only. Always verify against product information and local policy.
How it works
Powder vials are reconstituted by adding a specified diluent. After dissolving, the vial contains a solution with a concentration in mg/mL.
The key input is the final volume (often written as “reconstitute to X mL”). Use that final total volume (not the diluent volume added) to calculate mg/mL.
Formula
Worked examples
Example 1: 500 mg vial reconstituted to 5 mL final volume. What is the concentration?
Answer: 100 mg/mL
Example 2: 1 g (1000 mg) vial reconstituted to 10 mL final volume. What is the concentration?
Answer: 100 mg/mL
Example 3: 250 mg vial reconstituted to 5 mL final volume. What is the concentration?
Answer: 50 mg/mL
Clinical safety note
Always use the final volume stated on the product label/monograph (e.g., “reconstitute to 5 mL”), confirm diluent type, and follow local policy. This tool supports checking — it does not replace clinical judgement.
Related calculators
FAQs
Clinical reminder: Always follow local protocols and consult medication information sheets. These examples are for calculation practice only.
References & Sources
Medication safety and standards
References are provided for education. Always follow product information and local policy.